Most modifications include a README.txt or README.html etc you can view after downloading, some on the other hand have the info in the description. Any and I repeat ANY modification using a url such as
www.yoursite.com/mymod.php will have files to upload (unless utilizing misc.php etc etc). This information is something you must read through and interpret before installing otherwise you feel as you did when you originally posted and we don't want anyone feeling frustration however you must keep your temperament savvy and ask the right way for support... we don't bite dogs with bigger barks that's for sure but we might bark back

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